IT1261678B - STRUCTURE OF MULTI-PASS-BAND DIELECTRIC FILTER. - Google Patents

STRUCTURE OF MULTI-PASS-BAND DIELECTRIC FILTER.

Info

Publication number
IT1261678B
IT1261678B ITRM930345A ITRM930345A IT1261678B IT 1261678 B IT1261678 B IT 1261678B IT RM930345 A ITRM930345 A IT RM930345A IT RM930345 A ITRM930345 A IT RM930345A IT 1261678 B IT1261678 B IT 1261678B
Authority
IT
Italy
Prior art keywords
filter
resonators
duplexer
pass
different
Prior art date
Application number
ITRM930345A
Other languages
Italian (it)
Inventor
Darioush Agahi-Kesheh
Robert Kenoun
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of ITRM930345A0 publication Critical patent/ITRM930345A0/en
Publication of ITRM930345A1 publication Critical patent/ITRM930345A1/en
Application granted granted Critical
Publication of IT1261678B publication Critical patent/IT1261678B/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2056—Comb filters or interdigital filters with metallised resonator holes in a dielectric block

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

E' descritto un duplexer di filtro (280; 560; 780, 980, 1180; 1380; 1580), per esempio un duplexer di filtro per un ricetrasmettitore radio di minime dimensioni. Una prima porzione del filtro duplexer comprendente dei risuonatori (308, 312, 316; 6C8, 612, 616; 808, 812, 816; 1008, 1012, 1016; 1408, 1412, 1416; 1608, 1612, 1616) di almeno una prima configurazione geometrica, ed una seconda porzione del circuito del filtro duplexer comprende dei risuonatori (320, 324, 328, 332; 610, 624, 628, 622; 820, 824. 828, 832; 1020, 1024, 1028, 1032; 1220, 1224, 1228, 1232; 1420, 1424, 142, 1432; 1620. 1624, 1628, 1632) di una seconda configurazione geometrica. Le configurazioni geometriche delle due operazioni del circuito di filtro sono diverse e le ammettenze caratteristiche relative dei risuonatori delle rispettive porzioni dei circuiti del filtro sono diverse. Poiché i risuonatori delle due porzioni del circuito di filtro presentano diverse caratteristiche elettriche, una desiderata risposta in frequenza del filtro duplexer può essere ottenuta con simili capacità di carico dei risuonatori.A filter duplexer (280; 560; 780, 980, 1180; 1380; 1580) is disclosed, for example a filter duplexer for a very small radio transceiver. A first portion of the duplexer filter comprising resonators (308, 312, 316; 6C8, 612, 616; 808, 812, 816; 1008, 1012, 1016; 1408, 1412, 1416; 1608, 1612, 1616) of at least one first geometric configuration, and a second portion of the duplexer filter circuit includes resonators (320, 324, 328, 332; 610, 624, 628, 622; 820, 824. 828, 832; 1020, 1024, 1028, 1032; 1220, 1224, 1228, 1232; 1420, 1424, 142, 1432; 1620. 1624, 1628, 1632) of a second geometric configuration. The geometric configurations of the two operations of the filter circuit are different and the relative characteristic admittances of the resonators of the respective portions of the filter circuits are different. Since the resonators of the two portions of the filter circuit have different electrical characteristics, a desired frequency response of the duplexer filter can be obtained with similar load capacities of the resonators.

ITRM930345A 1992-05-26 1993-05-24 STRUCTURE OF MULTI-PASS-BAND DIELECTRIC FILTER. IT1261678B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88808992A 1992-05-26 1992-05-26

Publications (3)

Publication Number Publication Date
ITRM930345A0 ITRM930345A0 (en) 1993-05-24
ITRM930345A1 ITRM930345A1 (en) 1994-11-24
IT1261678B true IT1261678B (en) 1996-05-29

Family

ID=25392506

Family Applications (1)

Application Number Title Priority Date Filing Date
ITRM930345A IT1261678B (en) 1992-05-26 1993-05-24 STRUCTURE OF MULTI-PASS-BAND DIELECTRIC FILTER.

Country Status (9)

Country Link
JP (1) JP3205337B2 (en)
KR (1) KR970000059B1 (en)
CN (1) CN1029340C (en)
CA (1) CA2114029C (en)
FI (1) FI940399A (en)
FR (1) FR2693037B1 (en)
GB (1) GB2273393B (en)
IT (1) IT1261678B (en)
WO (1) WO1993024968A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4319241A1 (en) * 1993-06-09 1994-12-15 Siemens Matsushita Components Monolithic microwave ceramic filter
US5502422A (en) * 1994-08-12 1996-03-26 Motorola, Inc. Filter with an adjustable shunt zero
US5748058A (en) * 1995-02-03 1998-05-05 Teledyne Industries, Inc. Cross coupled bandpass filter
JP3158963B2 (en) * 1995-05-31 2001-04-23 株式会社村田製作所 Antenna duplexer
JPH10308604A (en) * 1997-03-05 1998-11-17 Murata Mfg Co Ltd Dielectric filter, dielectric duplexer and designing method therefor
US6087909A (en) * 1996-03-06 2000-07-11 Murata Manufacturing Co., Ltd. Dielectric filter having at least one stepped resonator hole with an elongated cross-section
ATE280441T1 (en) * 1998-03-18 2004-11-15 Epcos Ag MICROWAVE CERAMIC FILTER WITH IMPROVED SIDE STEEPNESS
JPH11312902A (en) * 1998-04-30 1999-11-09 Murata Mfg Co Ltd Dielectric filter, transmission/reception equipment and communication equipment
US6169465B1 (en) 1998-07-08 2001-01-02 Samsung Electro-Mechanics Co., Ltd. Duplexer dielectric filter
SE9804353L (en) * 1998-07-08 2000-01-09 Samsung Electro Mech Dielectric duplexor filter
KR100375583B1 (en) * 2000-11-18 2003-03-15 센티스 주식회사 A dielectric filter and duplexer dielectric filter for removing higher-order mode harmonic frequency and for improving skirt and spurious response
JP3788384B2 (en) * 2001-05-30 2006-06-21 株式会社村田製作所 Dielectric filter, dielectric duplexer, and communication device
JP2003318606A (en) 2002-04-23 2003-11-07 Sanyo Electric Co Ltd Dielectric filter
JP3883902B2 (en) 2002-04-25 2007-02-21 三洋電機株式会社 Dielectric filter
US9202660B2 (en) 2013-03-13 2015-12-01 Teledyne Wireless, Llc Asymmetrical slow wave structures to eliminate backward wave oscillations in wideband traveling wave tubes
CN103246538B (en) * 2013-05-16 2016-12-28 中国电子科技集团公司第四十一研究所 Make the intelligentized plug-in method of microwave apparatus circuit board

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6152003A (en) * 1984-08-21 1986-03-14 Murata Mfg Co Ltd Dielectric filter
US4742562A (en) * 1984-09-27 1988-05-03 Motorola, Inc. Single-block dual-passband ceramic filter useable with a transceiver
US4954796A (en) * 1986-07-25 1990-09-04 Motorola, Inc. Multiple resonator dielectric filter
JPH01213002A (en) * 1988-02-22 1989-08-25 Fuji Elelctrochem Co Ltd Dielectric branching filter
US4879533A (en) * 1988-04-01 1989-11-07 Motorola, Inc. Surface mount filter with integral transmission line connection
US5109536A (en) * 1989-10-27 1992-04-28 Motorola, Inc. Single-block filter for antenna duplexing and antenna-summed diversity
US5208566A (en) * 1992-01-21 1993-05-04 Motorola, Inc. Dielectric filter having adjacently-positioned resonators of dissimilar cross-sectional dimensions and notched side surface

Also Published As

Publication number Publication date
JPH06509693A (en) 1994-10-27
ITRM930345A0 (en) 1993-05-24
GB9400899D0 (en) 1994-04-13
FI940399A0 (en) 1994-01-26
FR2693037B1 (en) 1995-08-04
CN1082773A (en) 1994-02-23
CA2114029C (en) 1997-11-18
FI940399A (en) 1994-01-26
FR2693037A1 (en) 1993-12-31
GB2273393A (en) 1994-06-15
KR970000059B1 (en) 1997-01-04
WO1993024968A1 (en) 1993-12-09
ITRM930345A1 (en) 1994-11-24
JP3205337B2 (en) 2001-09-04
CA2114029A1 (en) 1993-12-09
GB2273393B (en) 1996-09-04
CN1029340C (en) 1995-07-12

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19960509